diff --git a/library/cipher.c b/library/cipher.c
index cf10094..5a96e2b 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -992,8 +992,7 @@
         }
 
         *olen = ilen;
-        return( mbedtls_chachapoly_crypt_and_tag( ctx->cipher_ctx,
-                                MBEDTLS_CHACHAPOLY_ENCRYPT,
+        return( mbedtls_chachapoly_encrypt_and_tag( ctx->cipher_ctx,
                                 ilen, iv, ad, ad_len, input, output, tag ) );
     }
 #endif /* MBEDTLS_CHACHAPOLY_C */